ProX Piston Kit Yamaha YZ125 YZ125X 05-22 Moly Coated 53.95mm-53.97mm

✨ProX Piston Kit Yamaha YZ125 YZ125X 05-22 Moly Coated 53.95mm-53.97mm

The ProX 01.2225 Series Piston Kit is the industry standard for maintaining the high-revving performance of your Yamaha YZ125 or YZ125X. Manufactured in Japan, these pistons are designed as a direct OEM replacement, cast from a high-silicon-content aluminum alloy that handles the extreme heat of 2-stroke racing. To ensure maximum engine life, each piston is CNC-machined to extremely close tolerances and features a Moly-coated skirt to reduce internal friction.

Available in precise graded sizes—Size A (53.95mm), Size B (53.96mm), and Size C (53.97mm)—this kit allows you to maintain the perfect piston-to-cylinder clearance as your Nikasil bore wears over time. When you buy ProX Piston Kit components, you are getting a complete top-end package including the piston, ring kit, wrist pin, and circlips. This is the go-to YZ125 replacement piston kit or YZ125X top end service kit for riders who demand factory-level reliability.

🔹Top Features ProX Piston Kit

• Japanese Precision: Engineered and manufactured in Japan to meet or exceed original equipment performance standards.
• Moly Coated Skirt: Advanced coating minimizes friction and wear during high-RPM operation and the critical break-in period.
• High-Silicon Alloy: Provides superior thermal stability and strength, preventing piston expansion and seizing in race conditions.
• Graded Sizing: Choose from Sizes A, B, or C to perfectly match your cylinder's current wear state for optimal compression.

🔹Fitment List

• 2005-2021 Yamaha YZ125
• 2020-2022 Yamaha YZ125X

🔹FAQ

Q: Will this ProX Piston Kit fit my 2021 Yamaha YZ125?
Yes, the 01.2225 series fits all Yamaha YZ125 models from 2005 to 2021 and YZ125X models through 2022.

Q: Should I buy the Size A, B, or C piston for my YZ125?
Size A (53.95mm) is for new or freshly plated cylinders. Size B (53.96mm) and Size C (53.97mm) are used to compensate for minor cylinder wear to maintain proper compression.

Q: Is this a complete YZ125X top end service kit?
This kit includes the piston, rings, wrist pin, and circlips. We recommend adding a top-end gasket set for a complete engine refresh.

🚀 Keep your 125 screaming with a fresh top end. Order your ProX piston kit today and experience the choice of champions.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. the best motocross shop in Central Florida.